An orgasm (sexual climax) is the conclusion of the plateau phase of sexual response cycle, and may be experienced by both males and females. Orgasm is characterized by intense physical pleasure, controlled by the involuntary, or autonomic, nervous system.[1] It is accompanied by quick cycles of muscle contraction in the lower pelvic muscles, which surround the primary sexual organs and the anus. Orgasms are often associated with other involuntary actions, including muscular spasms in other areas of the body, a general euphoric sensation and, frequently, vocalizations. The moments after orgasm are often a relaxing experience, which is attributed to the release of prolactin.[2] Male and female brains demonstrate similar changes during orgasm, with brain scans showing a temporary reduction in the activity of large parts of the cerebral cortex.[3]

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